$('document').ready(function(){
	//菜单折叠 -add
	$(".tree .opened").live('click',function(){
		$(this).attr("class",'closed')
		.children('ul').hide().end()
		.children('a').children('.minus').attr("class",'plus').src('');
	});
	$(".tree .closed").live('click',function(){
		$(this).attr("class",'opened')
		.children('ul').show().end()
		.children('a').children('.plus').attr("class",'minus').src('');
	});
});
